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Scientia Horticulturae xxx (2016) xxx–xxx
Contents lists available at ScienceDirect
Scientia Horticulturae
journal homepage: www.elsevier.com/locate/scihorti
Review
Fungus resistant grape varieties as a suitable alternative for organic
wine production: Benefits, limits, and challenges
a,∗ b,∗
Karine Pedneault , Caroline Provost
a
Centre de développement bioalimentaire du Québec, 1642 rue de la Ferme, La Pocatiere, Quebec, Canada
b
Centre de recherche agroalimentaire de Mirabel, 9850 Belle-Rivière, Mirabel, Quebec, Canada
a r t i c l e i n f o a b s t r a c t
Article history: Areas dedicated to organic wine production have significantly increased over the last few years. The
Received 5 November 2015
vast majority of organic wine is made from Vitis vinifera varieties that are highly susceptible to fungal
Received in revised form 8 March 2016
diseases and pests, making organic management difficult for growers. Depending on the growing area,
Accepted 14 March 2016
20–70% of organic growers declare issues with fungal diseases in Europe. Recently, fungus-resistant grape
Available online xxx
(FRG) varieties have been recommended as the most suitable choice in organic viticulture, especially in
areas where disease pressure necessitates high rates of fungicides. FRG varieties could contribute to
Keywords:
improved disease management in organic as well as conventional viticulture, reduce production costs
Interspecific hybrid
and decrease copper accumulation in soils. Recently, many FRG varieties presenting advantageous agro-
PIWI grape
nomic attributes and enological characteristics have been developed in North America and Europe for
Organic viticulture
Breeding conventional and sustainable farming. In this review, we present an overview of the benefits and limits
Phenolic compounds associated with FRG varieties in addition to the current knowledge regarding berry and wine composition,
Volatile compounds canopy management, and winemaking challenges and practices.
Resistance
© 2016 Elsevier B.V. All rights reserved.
Powdery mildew
Downy mildew Botrytis
Contents
1. Introduction ...... 00
2. Benefits and limits of FRG in organic viticulture ...... 00
2.1. Breeding for disease resistance and quality ...... 00
2.2. Economical and agricultural benefits of disease resistance ...... 00
2.3. Yield ...... 00
2.4. Marketing and wine quality...... 00
3. Growing FRG varieties for organic wine production ...... 00
3.1. Berry and juice composition ...... 00
3.1.1. Juice ...... 00
3.1.2. Berries ...... 00
3.2. Impacts of canopy management ...... 00
3.2.1. Managing yield and berry quality ...... 00
3.2.2. Impact on wine ...... 00
3.3. Challenges in FRG wine production ...... 00
3.3.1. Juice extraction and methanol ...... 00
Abbreviations: FRG, fungus resistant grape; M3GE, malvidin-3-glucoside equivalents; MDGE, malvidin-3,5-diglucoside equivalents; DW, dry weight; FW, fresh weight;
LC–MS/MS, liquid chromatography coupled to mass spectrometry; UPLC–MS, ultraperformance liquid chromatography coupled to mass spectrometry; HPLC-DAD, high
performance liquid chromatography coupled to diode-array detector; CE, catechin equivalent; B2E, procyanidin B2 equivalent; RE, resveratrol equivalent; TA, titratable
acidity; TSS, total soluble solids; YAN, yeast assimilable nitrogen. ∗
Corresponding authors.
E-mail addresses: [email protected], [email protected], [email protected] (K. Pedneault), [email protected] (C. Provost).
http://dx.doi.org/10.1016/j.scienta.2016.03.016
0304-4238/© 2016 Elsevier B.V. All rights reserved.
Please cite this article in press as: Pedneault, K., Provost, C., Fungus resistant grape varieties as a suitable alternative for organic wine
production: Benefits, limits, and challenges. Sci. Hortic. (2016), http://dx.doi.org/10.1016/j.scienta.2016.03.016
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2 K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx
3.3.2. Biogenic amines ...... 00
3.3.3. Tannins and color...... 00
3.3.4. Aroma ...... 00
3.4. Improving FRG wine quality ...... 00
4. Conclusion ...... 00
Acknowledgements...... 00
References ...... 00
1. Introduction carrying both disease-resistance genes and a significant percentage
(more than 85%) of V. vinifera in their pedigree; those are gen-
Organic wine production considerably increased over the last erally referred to as “PIWI” (from German: Pilzwiderstandsfähige,
ten years and accounts for nearly 5% of total production of today’s “disease resistant”) and are accepted as V. vinifera varieties in
wine market (Bonn et al., 2015; Willer and Lernoud, 2015). Rea- European catalogues (Sivcevˇ et al., 2010). In some cases though,
sons driving consumers toward organic wine varies from health “PIWI” indistinctly refers to both interspecific hybrids and newer
concerns to environmental awareness and interest for terroir, and “disease-resistant V. vinifera” varieties (Collective, 2008; Siegfried
the overall perception that organic wines are of higher value than and Temperli, 2008).
conventional ones (Bonn et al., 2015). Optimal variety selection is a key factor for successful imple-
Organic wines are expected to be free of synthetic pesticides, fer- mentation of organic grape production (Fragoulis et al., 2009;
tilizers or other synthetic inputs that could pose a higher risk than Sivcevˇ et al., 2010). Recently, FRG varieties have been rec-
conventional farming to human health or the environment (Mann ommended as the most suitable choice for organic viticulture
et al., 2010; Bonn et al., 2015). However, the vast majority of organic (Pavlousek,ˇ 2010; Sivcevˇ et al., 2010; Becker, 2013). Resistance
wine is made from Vitis vinifera varieties highly susceptible to fun- to major diseases such as powdery mildew significantly reduces
gal diseases and pests, making organic management difficult for the need for pesticides and thus represents a major advantage
growers (Wiedemann-Merdinoglu and Hoffmann, 2010). Depend- in organic farming, especially in humid areas such as Bordeaux
ing on the country origin, 20–70% of organic growers declare issues (Galbrun, 2008; Sivcevˇ et al., 2010; Wiedemann-Merdinoglu and
with botrytis and powdery mildew in Europe (Collective, 2008). Hoffmann, 2010; Fuller et al., 2014; Weigle and Carroll, 2015).
In contrast with conventional viticulture that integrates a Superficies devoted to organic wine production from FRG vari-
wide range of synthetic pesticides in pest management programs, eties are not well documented. In Germany, FRG occupied 7.9% of
organic viticulture mostly relies on sulfur- and copper-based fungi- organic vineyard surface areas in 2003 but projections were that
cides such as the Bordeaux mixture to control major diseases like 40% of the new plantings planned from 2010 to 2015 would be FRG
downy and powdery mildews, as well as a wide range of other cultivars (Sloan et al., 2010). In contrast, both old and recent FRG
diseases and insect pests (Provenzano et al., 2010). Copper-based varieties have spread extensively over the last 30 years in areas pre-
formulations have been used for more than a hundred years in senting challenging growing conditions such as wet summers and
European vineyards (Flores-Vélez et al., 1996), but copper has a cold winters with most of these varieties grown using conventional
low mobility in soil and was later found to accumulate to lev- management practices (Table 1). Very little research has been done
els that could threaten the environment (Komárek et al., 2010). to compare vineyard practices and pesticide use for FRG varieties
Indeed, copper concentration is typically much higher in vine- grown under conventional vs. organic management. In addition,
yard soils (20–665 mg/kg) compared to arable land (5–30 mg/kg) the large genetic pool found in FRG varieties makes them highly
(Besnard et al., 2001; Komárek et al., 2010). Such accumulation is variable in terms of viticulture (e.g., vigor, canopy management,
likely to occur in perennial crops like grapevines because copper berry ripening), berry composition (e.g., sugars, acids, phenolic
fungicides are continuously sprayed on the same land (Komárek compounds) and winemaking (e.g., aroma). In order to obtain a
et al., 2010). Correspondingly, vineyards located in wet areas show comprehensive understanding of FRG varieties with regards to
higher copper concentration than those from dry areas, which organic grape production, this review will present the benefits and
suffer less pressure from diseases (Komárek et al., 2010). Cop- limits of FRG for organic wine production, present their agronomic
per concentration reached 93 mg/kg in the 0–20 cm soil layer of a and oenological characteristics, and discuss challenges related to
Mediterranean organic vineyard with a dry climate, whereas values their use in wine production.
between 200 and 297 mg/kg have been reported in conventional
vineyards located in wet areas from Northern Italy (Provenzano
2. Benefits and limits of FRG in organic viticulture
et al., 2010).
The European Union recently established premium goals to
2.1. Breeding for disease resistance and quality
reduce pesticides, particularly copper, in viticulture (Rousseau
et al., 2013). One of the strategies is to shift from a treatment-
In phytopathology, “resistance” refers to the capacity of the
oriented approach to a disease prevention approach by the
plant to defend itself against pathogens (Prell and Day, 2001). Inter-
development of fungus-resistant varieties (Rousseau et al., 2013).
specific hybridization of grapevines began in the 19th Century and
Fungus-resistant grapes (FRG) result from interspecific cross-
was initially aimed at introducing pest and disease resistance in
breeding between the Mediterranean species V. vinifera and North
offspring (Galet 1999; Avenard et al., 2003; Reynolds, 2015). Many
American and Asian Vitis spp. such as V. riparia, V. amurensis and
FRG developed at that time carried undesirable “foxy” flavors in
V. rupestris that carries high resistance to fungal diseases, includ-
their wine, a default that was later attributed to the presence of
ing powdery and downy mildews, and grey rot. The firsts FRG
V. labrusca in the breeding process, resulting in the near elimina-
varieties, issued from traditional breeding, carried a significant
tion of this species in recent breeding (Hemstad and Luby 2000;
percentage of non-V. vinifera species in their genetic and were
Sun et al., 2011a). Later, several breeding programs implemented
therefore considered as “interspecific hybrids” (Sivcevˇ et al., 2010).
worldwide led to the development of varieties showing different
Recently, marker-assisted selection combined with multiple back-
characteristics such as cold-hardiness, short/long growing season,
crossing with V. vinifera varieties allowed the development of FRG
and pest resistance (detailed review by Reynolds, 2015).
Please cite this article in press as: Pedneault, K., Provost, C., Fungus resistant grape varieties as a suitable alternative for organic wine
production: Benefits, limits, and challenges. Sci. Hortic. (2016), http://dx.doi.org/10.1016/j.scienta.2016.03.016
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Table 1
Estimated growing area for significant FRG varieties grown in Europe, North America, and Asia.
Color Variety Estimated growing area (ha) Countries Ref.
a
red Chambourcin 200–1000 France, Italy, Switzerland 1
Baco Noir 200–1000 Canada, United States 2–5
Frontenac 200–1000 Canada, China, United States 2–4, 6
Maréchal Foch 200–1000 Canada, United States, France 2–5
Marquette 200–1000 Canada, United States 2–4
Regent >1000 Austria, Belgium, Bulgaria, Czech Republic, 1
Denmark, England, Germany, Hungary, Italy,
Netherlands, Sweden, Switzerland
white Baco Blanc >1000 France 7
Bianca >1500 Austria, Belgium, Czech Republic, Denmark, 1,7
Hungary, Italy, Moldova, Netherlands,
Romania, Serbia, Switzerland
Cabernet Blanc 200–1000 Austria, Germany, Switzerland 1
Frontenac Gris 200–1000 Canada, United States 2–4
Kunleány >1500 Hungary 1,7
La Crescent 200–1000 Canada, United States 3, 4
Vidal >1000 Canada 2–5
Villard blanc 200–1000 France 7
Zala Gyöngye >2500 Hungary 7
a
(1) Rousseau et al., 2013; (2) Association des vignerons du Québec, 2013 (Personal communication); (3) Tuck and Gartner, 2013; (4) Mount Kobau Wine Services, 2014;
(5) Grape Growers of Ontario, 2015; (6) Li et al., 2015; (7) Eurostat, 1999–2009.
The recent sequencing of the Vitis sp. nuclear genome signifi- varieties grown in six different European countries, the number
cantly contributed to the implementation of molecular breeding of fungicide treatments was reduced by 73% and 82% in organic
strategies in grapevines (see the review by Di Gaspero and Foria, vineyards with low and medium disease pressure, respectively
2015). These tools assist breeders in the selection of parents or (Rousseau et al., 2013). In a survey involving 65 German vineyards
of the most promising offspring (Di Gaspero and Foria, 2015). So under organic management, growers reported having to spray FRG
far, many markers related to desirable agronomic and enological varieties 3.8 times per season on average (Becker, 2013).
characteristics (e.g., fruit ripening time, berry size, color, acidity, Estimations are that growing FRG varieties could cut production
aroma) have been identified in grapevine, including a number of costs by two in French vineyards (Galbrun, 2008). In California, it
markers for disease resistance (Emanuelli et al., 2011; Merdinoglu has been estimated that powdery mildew resistant varieties could
and Caranta, 2013; Di Gaspero and Foria, 2015; Zini et al., 2015). allow cost savings as high as 48 M$ per year for the production
Genes related to disease resistance contribute to the activation subsets of Crimson Seedless Table grapes, raisin grapes and Central
of pathogen-specific defense mechanisms (PSDM) that induce a Coast Chardonnay wine grapes (Fuller et al., 2014).
hypersensitive response in plant upon the detection of specific The disease resistance of FRG varies with cultivar’s genetic and
pathogen-encoded Avirulence proteins (Verhagen et al., 2010; Wu growing location (Pavlousekˇ et al., 2014). Therefore most FRG vari-
et al., 2014). PSDM are among the most effective defenses of plants eties show some susceptibility to different pathogens, including
against pathogens (Wu et al., 2014). The main genetic markers downy mildew, powdery mildew, botrytis, black rot and anthrac-
related to PSDM in Vitis sp. include markers for downy mildew nose (Table 2). In organic management, these diseases are generally
(rpv1, rpv3, rpv10, rpv12) and for powdery mildew (ren1, ren3, run1) controlled using sulfur-based fungicides (i.e., Myco-San) (Rousseau
(Zini et al., 2015; Di Gaspero et al., 2012). et al., 2013; Siegfried and Temperli, 2008). When copper-based
So far, downy and powdery mildews, and botrytis have been pri- formulations are necessary, they are used at a much lower rate
marily targeted for the development of FRG varieties and several than for V. vinifera varieties (Van Der Meer and Lévite, 2010). In
cultivars bearing resistance to these diseases have been developed Québec (Canada), garlic powder suspension (marketed as Buran) is
over the last twenty years (Rousseau et al., 2013). Nevertheless, known among the local agronomists to efficiently prevent powdery
certain pathogens have been able to bypass the resistance mech- mildew in organic FRG.
anisms of certain FRG in field trials (Di Gaspero and Foria, 2015;
Merdinoglu and Caranta, 2013). Recently, the pyramidization of
resistance haplotypes from different grape species into new FRG
2.3. Yield
varieties prevented pathogens from bypassing resistance mecha-
nisms, therefore making FRG resistance more durable (Di Gaspero
The yield of organic V. vinifera grapevines can show 8–16%
and Foria, 2015; Merdinoglu and Caranta, 2013).
reduction compared to conventional grapevines (Bayramoglu and
Gundogmus, 2008; Guesmi et al., 2012). In contrast, FRG are
2.2. Economical and agricultural benefits of disease resistance often more vigorous and may show high productivity (10 000–20
000 T/ha), which could contribute to secure yields in organic pro-
The benefits of growing FRG cultivars go well upon the sector duction (Reynolds and Vanden Heuvel, 2009; Sun et al., 2011b;
of organic wine production. Indeed, most V. vinifera varieties have Rousseau et al., 2013; Barthe, 2015).
low to high susceptibility to fungal diseases that result in signif- Yields ranging from 7.0 to 11.8 T/ha were reported for FRG
icant production costs and economic losses (Fuller et al., 2014). grown under conventional management with minimal treatment
In Italy, the annual cost for controlling downy mildew in conven- in Switzerland (Siegfried and Temperli, 2008). In a five years study
tional vineyard typically ranges from 8 to 16 million Euros per carried out in New York State, organic Seyval blanc grapevines
year, depending on disease pressure (Salinari et al., 2006). Under produced, on average, 30% less crop than vines grown using con-
medium disease pressure, 12 treatments per season are neces- ventional management (12.7 vs. 19.9 Tons/ha, respectively; Pool,
sary for traditional V. vinifera varieties grown under conventional 1995). Such reduction was caused by differences in soil quality (e.g.,
management (Rousseau et al., 2013). In a study including 183 FRG the organic plots was inferior to that of conventional plots) and by
Please cite this article in press as: Pedneault, K., Provost, C., Fungus resistant grape varieties as a suitable alternative for organic wine
production: Benefits, limits, and challenges. Sci. Hortic. (2016), http://dx.doi.org/10.1016/j.scienta.2016.03.016
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Table 2
Overview of disease susceptibility, vigor and hardiness/cold tolerance of 41 fungus-resistant varieties.
a,b ◦ c
Variety Susceptibility to diseases Vigor Hardiness/Cold tolerance ( F) Ref.
DM PM BOT BR AT DA CG EUT
reds
Baco noir + ++ + +++ + +++ ++ high −10 to −20 1–7
−
Baltica + + + moderate 20 to −30 1, 8–10
−
Cabernet Carbon /+ ++ −/+ 2, 5
Cabernet Jura − −/+ −/+ 2, 5
Chambourcin + + ++ +++ + ++ moderate/high −5 to −15 1–6, 11
Chancellor +++ ++ + + + +++ ++ + moderate −10 to −20 1–6, 12, 13
Chelois + +++ + + +++ ++ −10 to −20 6
Concord + ++ + +++ +++ + +++ high −15 to −25 3, 4, 6
De Chaunac ++ ++ + + + ++ ++ +++ moderate/high −15 to −25 1–5
Frontenac −/+ ++ ++ ++ + ++ high −20 to −30 1, 3, 4, 8–10
Léon Millot + ++ + + + ++ ++ high −15 to −25 1–7, 11
Lucie Kulhmann + ++ + + moderate 1, 12, 13
Maréchal Foch + ++ + ++ + +++ +++ moderate −15 to −25 1–7, 11, 14
Marquette − + + + +++ high −20 to −30 1, 8–10, 14
Petite Perle + + + + + moderate −20 to −30 1, 8, 9, 14
Regent + + + + −5 to −15 2, 5, 7, 15
Sabrevois + + + + moderate −20 to −30 1, 10, 13, 14
Skandia + + + ++ moderate −20 to −30 1, 8, 9, 14
St. Croix ++ ++ ++ + + moderate/high −20 to −30 1, 3, 6, 8–10, 12–14
whites
Aurore ++ ++ ++ +++ + ++ +++ high −10 to −20 3–7
Bianca + + −/+ ++ −5 to −15 2, 5, 7, 16
Bronner −/+ + + 5, 2, 11
−
Cabernet blanc ++ ++ /+ −5 to −15 2, 5
Frontenac blanc −/+ + ++ ++ high −20 to −30 1, 8–10, 14
Frontenac gris −/+ + ++ + high −20 to −30 1, 8–10, 14
Geisenheim + +++ + + moderate 1
Helios ++ + + 2, 5, 11
Hibernal ++ + + + + moderate 1, 5, 12, 13
Johanniter ++ −/+ ++ 2, 5, 11
Kunleány ++ +++ − 5, 16
La Crescent + + ++ ++ high −20 to −30 1, 3, 8–10, 14
Louise Swenson + + + + ++ low −20 to −30 1, 8–10, 14
Osceola Muscat ++ ++ + + + high −15 to −25 1, 8, 9
Seyval + +++ ++ ++ + + ++ + moderate −10 to −20 1–7, 10, 11, 13, 14
Solaris ++ −/+ ++ −10 to −20 2, 5, 11, 14
Soleil blanc + −/+ ++ 2, 5, 11
St. Pepin + + + + moderate −20 to −30 1, 6, 10, 12–14
Traminette + + + + +++ ++ ++ + moderate/high −10 to −20 1, 3, 4, 10
Vandal-Cliche + + + +++ moderate/high −15 to −25 1, 10, 12, 13
Vidal + ++ −/+ + + + +++ + moderate −5 to −15 1–6, 10, 12, 13
Villard blanc − + + 5, 15
a
DM: downy mildew; PM: powdery mildew; BOT: Botrytis; BR: black rot; AT: anthracnose; DA: dead arm; CG: crown gall; EUT: Eutypa.
b
−/+ = resistant and few susceptible according to several references; − = resistant; + =slightly susceptible; ++ = moderately susceptible; +++ = highly susceptible.
c
(1) Dubé and Turcotte, 2011; (2) Sivcevˇ et al., 2010; (3) Dami et al., 2005a; (5) Rousseau et al., 2013; (6) Reisch et al., 1993; (7) Lisek, 2010; (8) Provost et al., 2012b; (8)
Wolf, 2008; (9) Provost et al., 2013; (10) Carisse and Lefebvre, 2011; (11) Tuchschmid et al., 2006; (12) Khanizadeh et al., 2008; (13) Khanizadeh et al., 2005; (14) Plocher
and Parke, 2008; (15) Avenard et al., 2003; (15) Daniela et al., 2013; (16) Pavlousek,ˇ 2013.
the competition caused by cover crops in the organic plot (Pool, The quality of FRG wines has been a key topic since their devel-
1995). opment in the 19th Century. Back then, many French-American
hybrids were thought to produce wine of “satisfactory commer-
cial quality” and were winning medals in wine competitions (Paul,
1996a). Recent studies showed that the quality of FRG wines is
2.4. Marketing and wine quality
generally rated as equivalent to that of V. vinifera (Van Der Meer
and Lévite, 2010; Pedneault et al., 2012; Rousseau et al., 2013).
FRG varieties are nearly completely absent from wine market-
For example, in a blind tasting carried out on 52 FRG wines from
ing in major wine producing countries, a situation that limits their
Europe, 62% red FRG varieties (24 wines tasted), including Caber-
expansion because they remain unknown to consumers. In a survey
net Jura (VB 5-02), Cabertin (VB 91-26-17) and the old interspecific
of 255 wineries growing FRG varieties (25% of them being under
hybrid Chambourcin (J. Seyve 26-205), were noted as equivalent
organic management), 40% of respondents pointed the “problem
or superior to Merlot (reference wine), and 31% of white (28 wines
of unknown varieties” as the biggest handicap for the marketing
tasted) were classified as equivalent or superior to the reference
of FRG wines (Becker, 2013). As FRG varieties carry non-V. vinifera
Chardonnay wine, including the interspecific varieties Gf. GA.47-42
genes (even at low levels), they may suffer from the perception that
(Bacchus Weiss X Seyval blanc), Saphira (Gm 7815-1), and Solaris
interspecific hybrids produce low-quality wines (Fuller et al., 2014).
(Fr 240-75) (Rousseau et al., 2013).
Similarly, organic wine has suffered from a reputation of aver-
A consumer study conducted in Switzerland concluded
age quality until recently (Collective, 2008). The need to educate
that 70–90% of consumers noted Solaris and Maréchal Foch
consumers to organic wines made from FRG varieties is therefore
wines as equivalent to V. vinifera Riesling and Zweigelt wines
significant.
Please cite this article in press as: Pedneault, K., Provost, C., Fungus resistant grape varieties as a suitable alternative for organic wine
production: Benefits, limits, and challenges. Sci. Hortic. (2016), http://dx.doi.org/10.1016/j.scienta.2016.03.016
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(used as reference wines), respectively, and 23–30% of consumers 3.2. Impacts of canopy management
judged the FRG wines as “clearly superior” to the reference V.
vinifera wines (Van Der Meer and Lévite, 2010). A consumer survey 3.2.1. Managing yield and berry quality
comparing 21 red FRG wines produced in Eastern Canada to three Controlling yield may contribute to enhance berry and wine
imported V. vinifera wines described as major selling products in quality, especially when the growing season is unfavorable to opti-
this area showed that 76% of FRG wines were judged as equivalent mal berry ripening (Berkey et al., 2011). Studies show that either
or superior to the reference wines (Pedneault et al., 2012). Most cluster or shoot thinning contribute to increased TSS and pH in FRG
FRG wines were blends that included Marechal Foch or Frontenac, berries, but results vary from one year to another and, in many
with other locally grown FRG varieties (Pedneault et al., 2012). trials, harvest date had a higher impact than yield management
(Tables 9 and 10). For example, 36% yield reduction using cluster
thinning negatively impacted increased the level of C6 compounds
3. Growing FRG varieties for organic wine production
in juice of Seyval blanc berries during a hot growing season in
Quebec (Canada) (Pedneault et al., 2015). Reducing yield signifi-
The chemical composition of FRG is highly variable from one
cantly increased skin softness in Seyval blanc berries, suggesting
variety to another, which is attributable to their large genetic pool.
that it may impact physical barriers protecting berries from fungal
This entails the need to optimize the relationship between varieties
infections (Barthe, 2015).
and growing conditions. Knowledge of berry chemical composition
Geneva Double Curtain (GDC) training contributed to increase
and of the impact of canopy management practices is essential to
yield but conversely reduced TSS and pH in a season-dependent
achieve that goal. Studies cited in the following Sections (3.1 and
manner in Chancellor (Reynolds et al., 1995). GDC and Umbrella-
3.2) were generally conducted under conventional management
Kniffin (UK) increased yield in Frontenac and Marquette,
and in northern areas; this is where most FRG have been grown and
respectively, but as UK increased TA and lowered TSS and pH in
studied. To our knowledge, no studies are available yet on canopy
Marquette, GDC increased TSS and pH, and lowered TA in Fron-
management practices for European PIWI varieties. Studies com-
tenac when compared to other training systems (Bavougian et al.,
paring organic to conventional management in V. vinifera varieties
2012; Martinson and Particka, 2013). Both Vertical Shoot Position-
have been reviewed by Provost and Pedneault (2016) and show that
ing (VSP) and High-Cordon (HC) increased the level of free volatile
organic management has generally a limited impact on berry and
terpenes in Traminette juice compared to GDC, Smart-Dyson (SD)
wine composition, and wine quality.
and Scott-Henry (SH) (Ji and Dami, 2008).
3.1. Berry and juice composition
3.2.2. Impact on wine
Shoot thinning significantly decreased yield and the level of C6
3.1.1. Juice
alcohols in Maréchal Foch wines, but did not impacted wine sen-
An overview of juice characteristics (e.g., TSS, pH, TA) of FRG
sory perception (Sun et al., 2011b). In contrast, taste and flavors
grown in different locations is presented in Table 3. Certain FRG
of wines derived from un-thinned control vines were preferred
varieties present high pH and high TA, which causes issues with
over those derived from cluster-thinned vines in Vandal-Cliche
microbial spoilage and color stability in wines (Morris et al., 1984a).
(Pedneault et al., 2015).
YAN level also varies largely among FRG varieties. The analysis
Chancellor wines issues from the GDC scored higher on berry
of 30 FRG varieties across Midwestern and Eastern United States
flavor than those issued from the Y-trellis system, whereas wines
showed YAN concentrations ranging between 89 and 938 mg/L
issues from Hudson River Umbrella (HRU) scored higher on color
(Stewart and Butzke, 2012). High YAN values (≥250 mg/L) are com-
and lower on earthy note intensities (Tables 9 and 10; Reynolds
mon in V. riparia-based FRG such as Frontenac (Mansfield, 2015a;
et al., 2004). GDC increased yield and decrease TSS and pH in Seyval
Slegers et al., 2015; Stewart, 2013). In addition, significant vari-
blanc, but GDC wines rated higher on melon notes intensity, and
ations are observed between years, growing areas and cultural
lower on earthy and vegetal flavors and astringency when com-
practices (Stewart, 2013).
pared to wines from 6-arms Kniffin (6AK) and Y-trellis systems
(Reynolds et al., 2004).
3.1.2. Berries
In Traminette, increasing cluster sunlight exposition improved
Red FRG berries typically show anthocyanin concentrations
wine color and sensory ratings for linalool, rose and spice aromas
ranging from 0.5 to 1.5 mg/g M3 G eq. FW in berries with low tan-
(Bordelon et al., 2008; Skinkis et al., 2010). Increasing cluster expo-
nin concentration ranging from 0.07 to 0.95 mg/g berry in seed, and
sition had little impact on aroma intensity in Seyval blanc wines,
from 0.03 and 0.79 mg/g berry in skin (Tables 4 and 5 ). Conversely,
but wines from exposed clusters were rated as superior (Reynolds
tannin levels in V. vinifera cv. Pinot noir reach 1.2 mg/g berry in
et al., 1986).
seed and 0.56 mg/g berry in skin (Springer and Sacks, 2014). The
profile of other phenolic compounds such as flavonols and phenolic
3.3. Challenges in FRG wine production
acid derivatives varies significantly from one FRG variety to another
(Tables 6 and 7). In red European PIWI varieties such as Caber-
Recent findings (Manns et al., 2013; Slegers et al., 2015; Springer
net Cortis and Regent, isorhamnetin-3-o-rutinoside is the major
and Sack, 2015) show that many aspects of current enology knowl-
flavonol whereas quercetin-3-o-glucoside is the major flavonol in
edge may have limited application with FRG varieties, because most
Baco noir and Lucy Khulmann (Ratnasooriya et al., 2011; Ehrhardt
of them present particular biochemical characteristics. Therefore,
et al., 2014). Caftaric acid is the major hydroxycinnamic derivative
particular winemaking practices should be developed for these
in most FRG varieties (Zhu et al., 2012; Manns et al., 2013; Ehrhardt grapes.
et al., 2014).
Stilbenes such as resveratrol are known to be involved in plant
3.3.1. Juice extraction and methanol
defense mechanism against fungal infections (Ehrhardt et al., 2014).
Many FRG varieties contain high levels of pectin that necessitate
trans-Resveratrol and its glucoside are the main stilbenes reported
the use of enzymes to increase juice yield at pressing. High pectin
in berries of French hybrid FRG varieties grown in Canada, whereas
levels have been thought to increase methanol concentration in
high levels of trans- and cis-piceid, pallitol and astringin have been
FRG wine (Lee et al., 1975). However, surveys showed that the level
reported in PIWI varieties from Italy and Germany (Table 8).
of methanol in FRG wines ranges between 20 and 197 mg/L, which
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6 K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx
Table 3
Overview of TSS, TA, pH and YAN levels in the juice of 41 fungus-resistant grape varieties from different growing areas.
Variety Localization TSS (Brix) TA pH YAN (mg/L) Ref.
Country Area Value Units Eq.
reds
a
Baco noir Canada Nova Scotia 18.5 0.82 % tartaric acid 2.66 1
Baltica Canada Québec 24.9 6.96 g/L tartaric acid 3.05 179 2
Cabernet Carbon Switzerland Stäfa 22.5–22.9 7.8–8.3 g/L n.a. 3.0–3.1 3
Switzerland Wädenswill 21.0 10.7 g/L n.a. 3.0 4
Cabernet Cortis Switzerland Wädenswill 22.3 10.6 g/L n.a. 3.1 4
Cabernet Jura Switzerland Wädenswill 21.2–24.0 8.1–10.2 g/L n.a. 3.0–3.4 3
Chambourcin China Beijing 20.2 4.2 g/L H2SO4 n.a. 5
Switzerland Wädenswill 19.0–21.6 12–12.4 g/L n.a. n.a. 4
United States Michigan 20.6–21.8 7.2–7.9 g/L n.a. 3.23–3.34 6
United States Ohio 20.1–21.3 10.7–11.2 g/L n.a. 3.20–3.27 7
Chancellor Canada British Columbia 18.5–23.5 12.2–16.0 g/L n.a. 3.12–3.37 8
United States Arkansas 14.8–17.1 0.74–0.93 % tartaric acid 3.47–3.79 9
Chelois United States Arkansas 14.8–18.2 0.68–1.07 % tartaric acid 3.61–3.80 9
Corot noir United States New York 15.0–17.8 7.5–11.6 g/L n.a. 3.34–3.75 213 10, 11
Frontenac Canada Québec 21.5–25.3 10.1–17.5 g/L tartaric acid 3.10–3.35 191–403 2,12–14
United States Iowa 21.4 10.4 g/L tartaric acid 3.39 15
United States Minnesota 22.9–26.4 14.9–18.5 g/L tartaric acid 2.86–3.12 16
United States Nebraska 19.7–22.5 14.6–20.9 g/L n.a. 2.92–3.12 17
Léon Millot Canada Nova Scotia 20.6 0.81 % tartaric acid 3.13 1
Switzerland Wädenswill 21.6 7.24 g/L n.a. 3.46 18
Lucy Khulman Canada Nova Scotia 21.1 0.76 % tartaric acid 3.11 1
Maréchal Foch Canada Nova Scotia 23.1 0.94 % tartaric acid 3.06 1
Canada Québec 21.6 7.24–10.3 g/L tartaric acid 3.18 95–108 12,14
Switzerland Wädenswill 21.6 9.7 g/L n.a. 3.2 4
United States Minnesota 24.6–26.1 8.7–11.8 g/L tartaric acid 2.99–3.05 16
United States New York 20.1–25.1 8.67–11.4 g/L n.a. 3.10–3.70 119 10, 19
Marquette Canada Québec 23.7–28.2 8.25–13.1 g/L tartaric acid 3.09–3.50 210–342 2, 12–14
United States Iowa 22.7 8.2 g/L tartaric acid 3.39 15
United States Minnesota 26.2–30.5 11.5–12.0 g/L tartaric acid 2.84–3.05 16
United States New York 21.9 9.37 g/L n.a. 3.09 329 10
Noiret United States New York 19.3 7.2 g/L tartaric acid 3.45 164 20
Petite Perle Canada Québec 22.9 7.38 g/L tartaric acid 3.33 299 2
Regent Germany n.d. 20.1–20.3 8.0–8.3 g/L n.a. – 21
Switzerland Stäfa 20.3–22.0 6.1–8.4 g/L n.a. 3.3–3.7 3
Sabrevois Canada Québec 18.6–19.2 13.4 g/L tartaric acid 3.16 213–221 12–14
Skandia Canada Québec 29 6.84 g/L tartaric acid 3.69 351 2
St. Croix Canada Québec 19.4–22.7 5.14–9.0 g/L tartaric acid 3.21–3.39 129–167 2, 12, 14
United States Iowa 16.8 6.3 g/L tartaric acid 3.73 15
United States Minnesota 20.9–24.1 3.87–4.96 g/L tartaric acid 3.08–3.50 16
Villard noir United States Arkansas 15.1–17.0 0.75–1.00 % tartaric acid 3.63–3.73 9
whites
Adalmiina Canada Québec 19.4 7.56 g/L tartaric acid 2.99 183 2
Aurore United States Arkansas 17.0–19.0 0.64–0.80 % tartaric acid 3.68–3.85 9
Bronner Switzerland Wädenswill 19.0–22.5 7.3–9.6 g/L n.a. 3.1 4
Cal 6-04 Switzerland Bevaix 21.0–24.5 10.2–12.4 g/L n.a. 2.9–3.0 3
Frontenac blanc Canada Québec 26.2 9.77 g/L tartaric acid 3.27 372 2
Frontenac gris Canada Québec 26.8 9.91 g/L tartaric acid 3.23 369 2
United States Minnesota 23.4–27.3 14.3–16.1 g/L tartaric acid 2.93–3.08 16
Helios Switzerland Wädenswill 21.6 8.5 g/L n.a. 3.2 4
Johanniter Switzerland Wädenswill 20.5 9 g/L n.a. 3.2 4
La Crescent Canada Québec 22.8 14.2 g/L tartaric acid 3 130 2
United States Minnesota 22.7–25.8 13.2–14.4 g/L tartaric acid 2.88–2.99 16
United States Iowa 21.8 8.9 g/L tartaric acid 3.36 15
Noah China Beijing 19.9 6.9 g/L H2SO4 5
Osceola Muscat Canada Québec 23.5 8.72 g/L tartaric acid 3.08 163 2
Seyval Canada Québec 17.7–22.4 8.77–12.3 g/L tartaric acid 2.86–3.16 94–180 22
United States Arkansas 16.9–17.6 0.60–0.89 % tartaric acid 3.69–3.91 9
Solaris Switzerland Stäfa 26.2–26.9 5.7–7.3 g/L n.a. 3.2–3.5 3
Switzerland Wädenswill 24.9–30.4 5.8–9.5 g/L n.a. 3.3 4
Soleil blanc Switzerland Wädenswill 22.9 8.73 g/L n.a. 3.43 18
St. Pepin United States Minnesota 22.0–23.8 8.8–9.8 g/L tartaric acid 2.94–3.25 16
Traminette United States New York 20.7 7.9 g/L tartaric acid 3.18 95 20
Vandal-Cliche Canada Québec 17.3–19.7 11.2–13.4 g/L tartaric acid 2.85–2.92 99–162 22
Verdelet United States Arkansas 16.2–20.1 0.35–0.84 % tartaric acid 3.63–4.32 9
Vidal blanc United States Michigan 18.8–20.2 0.65–1.02 % tartaric acid 3.28–3.30 23
Villard blanc China Beijing 20.1 6.8 g/L H2SO4 5
a
(1) Ratnasooriya et al., 2011; (2) Provost et al., 2012a; (3) Siegfried and Temperli, 2008; (4) Tuchschmid et al., 2006; (5) Zhu et al., 2012; (6) Miller et al., 1996; (7) Dami
et al., 2006; (8) Reynolds et al., 1995; (9) Morris et al., 1984b; (10) Manns et al., 2013; (11) Sun et al., 2012; (12) Slegers et al., 2015; (13) Pedneault et al., 2013b; (14) Pedneault
et al., 2013a); (15) Vos, 2014; (16) Haggerty, 2013; (17) Bavougian et al., 2012; (18) Striby, 2006; (19) Sun et al., 2011b; (20) Nisbet et al., 2014; (21) Eibach and Töpfer, 2003;
(22) Barthe et al., 2012; (23) Wolpert et al., 1983.
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K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx 7 e Ref. 1 2 3 4 3 3 3 4 4 5 6 1 7 2 7 7
d
– – – 6.1 44.9–62.3 4.71–6.66 22.4–23.8 Pt-3,5-O- diglucoside Method a a b c b b b c c b d a e a e e
DW DW DW DW
a a g g g g
FW FW FW
FW FW
a b a c a c c
mg/100 mg/100 mg/100 mg/100 mg/L mg/L mg/L Units mg/g mg/g mg/kg mg/kg mg/kg mg/L mg/L mg/L mg/L 0.04 0.22 0.17 Pl-3,5-O- diglucoside
1.95 0.61 1.3 50.6 148–163 50.5–56.9 128–153 Mv-3,5-O- diglucoside anthocyanin
84.6 224–1138 671–897 479–919 4.64–8.34 0.994–1.26 Total
.
21.7 59.7 60.1 25.6–29.5 6.12–7.01 15.3–17.8 Pn-3,5-O- diglucoside 2013
- al., p
- et
128 91 313 Mv-3-(6 coumaroyl)-O- glucoside
Manns
3.11 9.84 4.7 15.7–19.8 1.98–2.39 3.47–3.60 Cy-3,5-O- diglucoside (7)
;
2007
- al., p
- et
HPLC-DAD. – – – 34.0–49.0 2.88–7.39 12.2–15.0 Dp-3,5-O- diglucoside
e)
; 4.44 34 36.4 Pn-3-(6 coumaroyl)-O- glucoside varieties. Prajitna
520nm (6) eq.
;
grape at
nd 0.72 0.32 Pl-3-O- glucoside 2012
- p al., -
UV–vis
et
Zhu 31.5 36 69 Pt-3-(6 coumaroyl)-O- glucoside
fungus-resistant
(5)
; 190 79 96 220 110 234 203 7.3 12.2–17.0 45.1–89.6 28.9–31.1 Mv-3-O- glucoside of
malvidin-3,5-diglucoside
2014
in wines
al.,
Spectrophotometry -
p et -
and d)
4.84 57 41.5 4.1 0.77–1.05 1.62–3.39 0.87–1.39 Pn-3-O- glucoside quantified 7.15 60 49.9 coumaroyl)-O- glucoside Cy-3-(6 berry)
Pelargonidin. Ehrhardt
are
Pl:
(4)
whole ;
UPLC–MS/MS;
c)
2011 (skin,
- 150 30.1 100 200 130 87 71.3 12.0–16.7 16.1–49.0 9.38–16.6 Pt-3-O- glucoside p Malvidin;
- al., diglucosides
et
Mv:
berries eq.;
40.9 76 164 Dp-3-(6 coumaroyl)-O- glucoside
LC–MS/MS; in
b)
Peonidin;
40 2.93 21 55 42 30 24.4 1.00–1.54 1.14–2.21 0.78–0.84 Cy-3-O- glucoside Ratnasooriya assay;
Pn:
(3)
; eq. concentration -acetyl)-O-
eq.
malvidin-3-glucoside 2011b
Petunidin; in
72.2 15.6 29.9 Mv-3-(6 glucoside
precipitation
al., Dp-3-O- glucoside* 190 66.6 130 200 250 408 221 14.5–18.0 12.6–56.3 6.72–14.9
Pt:
et
anthocyanin
Sun protein
total quantified
(2)
;
Cyanidin;
USA USA USA USA USA USA USA USA Canada Canada Canada Canada
are
and
-acetyl)-O- Cy: Italy OH, NY, NY, Origin NY, NY, NS, Italy NS, NS, NS, Germany China NY, NY, NY,
malvidin-3-glucoside malvidin-3,5-diglucoside 2012
in in
-3-(6 al.,
profile
1.5 2.87 3.12 Pn glucoside et
Foch Foch Foch
cortis
Sun Adams-Harbertson
noir noir
4 Millot Noir Khulman
Delphinidin;
Quantified Quantified Monoglucosides (a) (1) c a e berry wine Léon wine Chambourcin Maréchal Marquette Variety Cabernet Lucy Maréchal Regent Maréchal berry Baco Corot Variety skin Corot skin b d Anthocyanin
Table *Dp:
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8 K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx
is slightly higher than V. vinifera wines (26–111 mg/L) but signif- 3.3.2. Biogenic amines
icantly lower than the recommended limits of OIV for both reds Exogenous nitrogen sources are routinely used to ferment V.
≤ ≤
( 400 mg/L) and whites ( 250 mg/L) (Lee et al., 1975; Organisation vinifera varieties. In FRG carrying high YAN levels (see Section
Internationale de la Vigne et du Vin, 2011). 3.1.1), this enrichment may cause an unwanted rise in fermentation
temperature and contribute to increase the level of fusel alcohols,
undesirable biogenic amines (e.g., histamine) and carcinogenic
Table 5
Flavan-3-ols profile and total tannin concentration in berries (seed, skin, whole berry) and wines of fungus-resistant grape varieties. Data on Vitis vinifera (Pinot noir var.)
are presented for comparison purposes (from Springer and Sacks, 2014).
Matrix Variety Origin (+)-catechin (−)-epicatechin epigallocatechin (−)-epicatechin 3-O-gallate
seed
red Baco noir NY, USA
ON, Canada 98 106
Corot noir NY, USA
NY, USA
DeChaunac NY, USA
ON, Canada 135 78
Frontenac QC, Canada
Léon Millot NY, USA
Maréchal Foch NY, USA
ON, Canada 46 42
QC, Canada
Marquette QC, Canada
Noiret NY, USA
Sabrevois QC, Canada
St. Croix QC, Canada
Vincent ON, Canada 155 284
*
Pinot noir NY, USA
white Seyval ON, Canada 21 23
skin
reds Baco noir NY, USA
Corot noir NY, USA
NY, USA
DeChaunac NY, USA
Frontenac QC, Canada
Léon Millot NY, USA
Maréchal Foch NY, USA
QC, Canada
Marquette QC Canada
Noiret NY, USA
Sabrevois QC Canada
St. Croix QC Canada
*
Pinot noir NY, USA
berry
red Baco Noir NS, Canada 1700 1100 15 140
Cabernet cortis Italy 94.5 101
Léon Millot NS, Canada 860 600 11 99
Lucy Khulman NS, Canada 1700 780 11 88
Maréchal Foch NS, Canada 2100 990 15 99
Regent Germany 176 148 57.4
Italy 167 115 36.7
white Johanniter Italy 84.9 42.1
Phoenix Germany 231 187 121.7
Italy 64.2 16.5
Solaris Italy 81 111 12.7
wine
red Baco noir NY, USA
Chambourcin China 1.23 1.23 3.28
GA, USA 4.1–9.3 2.6–14.8
Corot noir NY, USA
NY, USA 19.3–36.8 16.4–32.8
NY, USA
Frontenac QC Canada
Maréchal Foch NY, USA
NY, USA 36−337 11.5–62.1
QC, Canada
Marquette NY, USA 13.9–30.0 5.55–14.4
QC, Canada
Sabrevois QC, Canada
St. Croix QC, Canada
Noiret NY, USA
*
Pinot noir NY, USA
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K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx 9
Table 5 (Continued)
Matrix epigallocatechin procyanidin procyanidin procyanidin procyanidin procyanidin total Units Method Ref. gallate B1 B2 B3 B4 C1 tannins
seed
b c
red 0.454 mg/g berry CE a 1
a
33 91 41 127 10 mg/100 g seed CE or B2E b 2
0.33–0.53 mg/g berry CE a 3
0.917 mg/g berry CE a 1
0.264 mg/g berry CE a 1
4 22 2 12 tr mg/100 g seed CE or B2E b 2
0.200 mg/g epicatechin eq. c 4
0.594 mg/g berry CE a 1
0.763 mg/g berry CE a 1
14 43 23 61 4 mg/100 g seed CE or B2E b 2
0.377 mg/g epicatechin eq. c 4
0.259 mg/g epicatechin eq. c 4
0.208 mg/g berry CE a 1
0.069 mg/g epicatechin eq. c 4
0.170 mg/g epicatechin eq. c 4
60 106 27 45 tr mg/100 g seed CE or B2E b 2
1.19 mg/g berry CE a 1
white 3 9 2 0 mg/100 g seed CE or B2E b 2
skin
reds 0.178 mg/g berry CE a 1
0.19–0.31 mg/berry CE a 3
0.34 mg/g berry CE a 1
0.178 mg/g berry CE a 1
0.051 mg/g epicatechin eq. c 4
0.221 mg/g berry CE a 1
0.248 mg/g berry CE a 1
0.030 mg/g epicatechin eq. c 4
0.055 mg/g epicatechin eq. c 4
0.785 mg/g berry CE a 1
0.076 mg/g epicatechin eq. c 4
0.192 mg/g epicatechin eq. c 4
0.559 mg/g berry CE a 1
berry
red 8.7 mg/kg DW d 5
# #
43.8 106 28.2 mg/kg FW berries e 6
7.5 mg/kg DW d 5
7 mg/kg DW d 5
8 mg/kg DW d 5
# #
54.7 64.7 30.9 mg/kg FW berries e 6
# #
65.3 93.7 45.5 mg/kg FW berries e 6
# #
white 37.8 50.2 23 mg/kg FW berries e 6
# #
66.8 59.3 38.4 mg/kg FW berries e 6
# #
19.3 22.6 91.7 mg/kg FW berries e 6
# #
3.6 113 17.9 mg/kg FW berries e 6
wine
red 49 mg/L CE a 1
mg/L CE d 7
2.5–9.6 mg/L CE f 8
42.1–63.6 mg/L CE a 3
mg/L f 9
113 mg/L CE a 1
85.5 mg/L epicatechin eq. c 4
83 mg/L CE a 1
mg/L f 9
120 mg/L epicatechin eq. c 4
mg/L f 9
145 mg/L epicatechin eq. c 4
200 mg/L epicatechin eq. c 4
97.3 mg/L epicatechin eq. c 4
354 mg/L CE a 1
358 mg/L CE a 1
*
Vitis vinifera.
#
Procyanidins B2 and B4 quantified together.
a
Monomers are quantified as CE; dimers and trimers are quantified as B2E.
b
Analytical method: (a) Adams-Harbertson protein precipitation assay; (b) HPLC-UV–vis; (c) HPLC-Fluorescence; (d) LC–MS/MS; (e) UPLC–MS/MS; (f) HPLC-DAD.
c
(1) Springer and Sacks, 2014; (2) Fuleki and Ricardo da Silva, 1997; (3) Sun et al., 2012; (4) Pedneault et al., 2014; (5) Ratnasooriya et al., 2011; (6) Ehrhardt et al., 2014;
(7) Zhu et al., 2012; 8) Auw et al., 1996; (9) Manns et al., 2013.
Please cite this article in press as: Pedneault, K., Provost, C., Fungus resistant grape varieties as a suitable alternative for organic wine
production: Benefits, limits, and challenges. Sci. Hortic. (2016), http://dx.doi.org/10.1016/j.scienta.2016.03.016
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10 K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx d c Ref. 1 1 1 1 1 1 1 2 3 4 4 4 Ref. 1 2 1 1 1 2 2 2 2 2 2 3 4 4 4 3 3
c
b
Method a a a a a a a b c c c c Method a b a a b b b b b a c c c a a
FW FW FW FW FW FW FW DW FW DW DW a DW FW b FW FW FW FW FW
a b
a a a mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/L mg/L mg/L mg/L mg/L Units Units mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/L mg/L mg/L mg/L
4.81 ethyl gallate
1.63 0.93–1.30 1.41–1.68 0.57–0.82 protocatechuic acid
syringetin-3-glucoside 5.69 3.1 0.2
7.79 2.9–17.0 4.64–10.7 6.19–12.6 4.45–8.00 gallic acid rutin 0.65–7.720.82–2.97 2.07–4.68 mg/L mg/L
acid
ND-0.70 ND-0.16 quercetin 5.63 0.54–1.29 2.37 3.31
derivatives dihydroxybenzoic acid ND 0.02 ND ND 0.03 ND ND 0.60–1.61 ND-2.09 ND-1.47 Benzoic
varieties.
0.61–3.68 2.37–3.84 3.09–6.64 GRP (GAE).
eq.
grape
acid
3.96 1.75 2.12 4.93 1.79 1.57 1.79 1.09 0.54–1.76 1.48–2.65 1.23–1.33 fertaric acid
gallic isorhamnetin-3-o-rutinoside 50.9 87.2 163.1 nd nd nd nd
. mg/L
2.97 4.78 1.81 2.59 2.28 1.54 2.44 ellagic acid in fungus-resistant
2013
al.,
white et
0.07–2.02 ND-0.71 ND-0.37 coumaric acid ethyl ester and quantified
Manns are red
varieties.
(4)
; 0.05–1.17 ND-0.61 0.01–1.17 caffeic acid ethyl ester quercetin-3-o-glucuronide 20.9 60 18.9 10.3 24.7 6.44 10.9 some
grape
of
1996
.
derivatives
al.,
wines et
2013
25.7 30 8.72 6.44 6.49 0.9 6.93 5.76 nd-9.3 2.09–13.5 1.18–10.6 4.79–7.24 coutaric acid
acid
al., and
Auw
et
(3)
benzoic fungus-resistant ;
1.36–14.2 3.54–4.82 0.43–2.25 coumaric acid berries
Manns
in
2012
quercetin-3-o-glucoside 20 34.1 16 8 45.6 8.1 20.2 17.2 16 32.7 6.84 1.49 ND
white (CAE);
(4)
al., ;
eq. and
et
ND-0.25 ND-0.37 ND cinnamic acid content
1996
red
acid
Zhu
al.,
(3)
et
; some
caffeic
54.6 36 12.7 17.9 26.3 1.02 15.5 0.7–15.3 7.67–30.4 26.7–58.8 caftaric acid of
derivatives Auw
2014
mg/L
(3) acid al.,
wines ; HPLC-DAD.
acids in
et
(c) kaempferol-3-o-glucoside 3.18 4.04 nd 5.38 4.42 nd 3.65
and
2012
al., HPLC-DAD. benzoic
derivatives
(GAE). c) et (QE).
Ehrhardt
quantified
USA USA USA berries
Canada Canada CanadaCanada 35
and and Hydroxycinnamic caffeic acid 2.2 4.40–11.50 2.98–6.64
eq. in eq.
(2)
are Zhu
Origin NS, NS, NS, Germany Italy Germany Italy China NY, NY, China China Italy Italy
;
acid (2)
; USA USA USAUSA 2.79–4.02 8.52–44.1
2011
Foch Foch
HPLC-ESI–MS/MS; cortis Italy
content
Italy Italy GA, Origin Italy Germany Italy Germany Italy China NY, NY,
al., quercetin gallic
blanc
2014
(b)
UPLC–MS/MS; noir NY,
Millot
Noir Khulman NS, derivatives et
b) al.,
Foch NY, mg/L mg/L cortis
et flavonol hydroxycinnamic
Variety Baco Cabernet Johanniter Chambourcin Noah Leon Lucy Marechal Regent Phoenix Solaris Corot Maréchal Marquette Villard
in in
noir
the the
of of white Johanniter Phoenix Solaris Corot Maréchal Marquette Variety red Cabernet Regent red Chambourcin
red red white white
Ratnasooriya Ehrhardt
LC–MS/MS; UPLC–MS/MS;
6 7
Quantified (a) (1) Hydroxycinamic Quantified (a) (1) c c a a wine Matrix berry Matrix berry wine b b d Table Table
Overview Overview
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production: Benefits, limits, and challenges. Sci. Hortic. (2016), http://dx.doi.org/10.1016/j.scienta.2016.03.016
G Model
HORTI-6344; No. of Pages 21 ARTICLE IN PRESS
K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx 11 c Ref. 1 2 1 1 1 2 2 2 2 2 2 3 3 4 5 3 3 3 3 3 3 3 3 3 3 4 4 3 3 3
b
Method a b a a a b b b b b b c c a d c c c c c c c c c c a a c c c
a DW FW DW DW DW FW FW FW FW FW FW
RE RE RE RE RE RE RE RE RE RE RE RE RE RE RE RE RE RE
Units mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L
astringin 0.26 4.01 0.28 0.13 0.15 0.18 0.13 0.16 0.18 0.30 0.10 0.17 0.22 0.10 0.16 0.04 0.35 0.13 0.30 0.04 0.12 0.06
pallidol 0.22 5.62 0.48 0.16 nd 1.94 0.26 0.26 0.14 0.36 0.09 0.40 0.28 0.38 0.16 0.06 0.315 0.25 0.25 0.11 0.24 0.19
purposes.
piceid
total 3.57 3.95 7.02 0.96 1.13 2.84 2.36 1.64 0.64 2.81 1.34 2.88 1.29 1.56 1.72 comparison
for
shown
are
-piceid , 0.41 11.3 0.44 0.18 0.57 0.16 nd nd nd nd cis (2007)
al.
et
-piceic .
Naugler
0.23 7.05 0.21 0.08 0.31 0.08 0.09 tr 9.3–29.6 0.16 0.5 trans 2007
from
al.,
et
wines,
Prajitna -resveratrol
vinifera (5)
; 9.8 9.0 8.5 7.8 trans glucoside Vitis
2012
on
al.,
et
Data
Zhu
-resveratrol (4)
; cis 0.01 0.17 0.01 0.01 0.02 nd nd 3.68 0.80 0.5–1.9 0.41 0.37 0.38 0.80 0.95 0.68 0.74 1.76 0.65 1.0 0.44 0.45 0.58 varieties.
2007
grape
al.,
et
-resveratrol
Naugler
trans 4.5 nd 4.3 4.3 4.7 1.94 nd nd nd nd nd 0.86 0.90 1.4–6.4 0.65 0.49 0.75 1.17 1.92 0.93 0.15 4.55 0.99 1.10 0.56 0.56 0.62 (3)
; fungus-resistant
of
2014
USA Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada Canada
al.,
wines
Origin NS, Italy NS, NS, NS, Germany Italy Germany Italy NS, China NS, NS, NS, NS, NS, China China NS, NS, NS, Italy Italy NS, OH, NS, NS, NS, NS, NS, et
HPLC-DAD. and
(c)
(RE).
Ehrhardt
berries
eq. Kuhlman
in
;(2)
reds 2011
Foch Foch
cortis
UPLC–MS/MS;
content
blanc
al.,
resveratrol
noir/Cabernet noir Kuhlman (b) Millot Millot Millot/Lucie
Noir noir
Khulman
et
Chaunac
vinifera
mg/L
Variety red Baco Cabernet red Baco Zweigelt/Cabernet Leon Lucy Maréchal Regent white Johanniter Phoenix Solaris Chambourcin de Leon Leon Lucie Maréchal white Noah Villard V. Pinot Pinot stilbene
in
the
of
berry
Ratnasooriya HPLC–MS/MS;
8
Quantified (a) (1) c a Matrix whole wine b Overview
Table
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Table 9
Impact of cultural practices on grapevine, berries, juices and wine from red varieties.
treatment variety # year main effects observed on ref.
grapevine berry/juice wine
a
cluster thinning Chambourcin 2–4 yield increased with crop thinning increased TSS, 1
level; TA, and pH
thinning favored
lignification and reduced
bud cold injury
Chambourcin 5 thinning reduced yield, thinning increased TSS, 2
increased cluster and berry and pH
weight
DeChaunac 3 same yield and berry no impact on TA, TSS, 3
weight and pH
DeChaunac 2 thinning increased TSS 4
and total phenols
Marquette nd thinning reduced yield thinning increased TSS 5
and pH
cluster thinning, Baco noir 3 pruning reduced yield, pruning increased pH 6
pruning cluster weight and TSS
cluster thinning, shoot Chancellor 3 thinning increase cluster thinning increased TSS, 7
thinning and berry weight pH, and red color
shoot thinning Concord nd thinning increase cluster thinning increased TSS 8
weight
Frontenac 1 similar cluster weight, 9
reduced berry weight
Frontenac 1 6 shoot/ft had highest no impact on TA, TSS, 10
cluster number and yield and pH
Maréchal Foch 2 thinning reduced yield, thinning increased TSS thinning decreased the 11
increased berry weight in juice, and berry level of C6 alcohols anthocyanins (cis-3-hexenol,
trans-2-hexenol,
1-hexanol) in wines
but impact on wine
sensory perception
were minor;
no impact on wine anthocyanin
b
training system Chancellor 5 GDC and YT increased When significant, GDC 12
yield, reduced cluster showed TSS, TA and pH
weight and showed in the lowest range,
optimal level of pruning and level of
weight when compared to anthocyanin in the
HRU, 6AK, MWC highest range
Chancellor 4 GDC and 6AK had highest 6AK and YT had the 6AK wines had lowest% 13
yields; 6AK and YT had lowest TSS and the ethanol, TA and pH;
highest cluster weight highest pH GDC wines had the
highest berry flavour
and YT the lowest;
HRU wines had the
highest color intensity
and the lowest
intensity in earthy
notes
no impact on wine
anthocyanins
Frontenac 2 GCD increased yield GDC had higher pH and 14
TSS, and lower TA
Frontenac nd VSP had higher total 15
phenol concentration
than SD
Marquette nd UK increased yield, cluster VSP increased TSS and 16
weight, and clusters/vine pH;
UK had lowest TSS and
pH, and higher TA
training system and Marquette 2 TWC had higher yield and TWC had lower TSS; 17
cluster thinning cluster weight cluster thinning
increased TSS in TWC
and VSP 18”
St. Croix 2 TWC increased yield and TWC had higher TSS; 17
cluster weight; cluster cluster thinning
thinning reduced yield increased TSS
a
(1) Dami et al., 2005b; (2) Dami et al., 2006; (3) Morris et al., 1987; (4) Wood and Looney, 1977; (5) Emling and Sabbatini, 2013; (6) Byrne and Howell, 1978; (7) Morris
et al., 2004; (8) Zabadal et al., 2002; (9) Rolfes et al., 2012; (10) Rolfes, 2014; (11) Sun et al., 2011b; (12) Reynolds et al., 1995; (13) Reynolds et al., 2004; (14) Bavougian et al.,
2012; (15) Bavougian et al., 2013; (16) Martinson and Particka, 2013; (17) Provost et al., 2012b.
b
6AK: 6-arm Kniffin; GDC: Geneva double curtain; HRU: Hudson River Umbrella; SD: Smart-Dyson; TWC: Top Wire Cordon; UK: Umbrella Kniffin; VSP: Vertical Shoot
Positioning; YT: Y-trellis.
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Table 10
Impact of cultural practices on grapevine, berries, juices and wine from white fungus-resistant grape varieties.
treatment variety # years main effects observed on ref.
grapevine berry/juice wine
a
cluster thinning Seyval 4 yield was similar no impact on TA, TSS, 1
between treatments; pH
thinning increased
berry weight
Seyval 1 thinning increased thinning increased TSS 2
cluster weight, reduced
yield
Vandal-Cliche 2 thinning reduced yield no impact on TA, TSS, 2
pH
Vidal 2 thinning increased thinning increased 3
cluster weight TSS/TA ratio
leaf removal Frontenac gris nd no impact on berry size no impact on TSS, TA, 4
pH
leaf removal, La Crescent nd no impact on berry size leaf removal + no 4
cluster thinning thinning increased TSS
cluster exposition vs Seyval 2 higher occurrence of higher TSS and lower non significant 5
shading bunch rot in shaded TA in exposed clusters differences between
clusters intensity of aroma,
perceived acidity and
quality of wines, but
authors stated that
wines from exposed
clusters were
“superiors”
Traminette 3 full shaded clusters had fruit exposure 6
3
lower TSS and PVT in increased wine color
juice; and sensory ratings for
fully exposed berries linalool, rose and spice
had higher PVT aromas
no impact on wine
taste, aftertaste and
mouthfeel
shoot and Seyval 2 shoot and cluster little impact on TSS, TA, wines issued from the 7
cluster thinning thinning reduced yield pH cluster thinning
treatment were
preferred by the
sensory panel only in
the cooler year;
under “normal”
conditions, panelists
rated the wines
similarly
shoot thinning La Crescent 1 similar cluster weight, 8
reduced berry weight
training system Kunleàny nd single curtain reduced 9
winter frosts
b
Seyval 4 GDC , 6-AK and YT had GDC and YT had lowest GDC wines had lowest% 10
highest yields and TSS and pH ethanol and TA;
lowest cluster weight GDC wines had higher
intensity on melon
notes, had low earthy
and vegetal character,
and had the lowest
astringency
Traminette 5 SH had highest yield SH and HC had higher 11
c
compared to HC TA, no impact on FVT
and PVT
Traminette 2 GDC had highest berry VSP, SH and SD had the 12
weight compared to lowest TA;
SH, SD and HC VSP had the highest
juice pH;
VSP and HC increased
the level of FVT in juice
training system Louise Swenson 2 cluster thinning TWC had higher TSS 13
and cluster thinning significantly reduced compared to VSP;
yield cluster thinning
increased TSS level in must
a
(1) Morris et al., 1987; (2) Barthe et al., 2012; (3) Wolpert et al., 1983; (4) Portz et al., 2010; (5) Reynolds et al., 1986 (6) Skinkis et al., 2010; (7) Berkey et al., 2011; (8)
Rolfes et al., 2012; (9) Balogh, 1989; (10) Reynolds et al., 2004; (11) Bordelon et al., 2008; (12) Ji and Dami, 2008; (13) Provost et al., 2012b.
b
6AK: 6-arms Kniffin; GDC: Geneva double curtain; HC: High cordon; SD: Smart-Dyson; SH: Scott Henry; TWC: Topwire Cordon; YT: Y-trellis.
c
FVT: free volatile terpenes; PVT: potentially-volatile terpenes.
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14 K. Pedneault, C. Provost / Scientia Horticulturae xxx (2016) xxx–xxx
ethyl carbamate in wine (Vincenzini et al., 2009). Studies compar- and/or C6 compounds such as hexanol and cis-3-hexenol in wine
ing the level of biogenic amine in FRG and V. vinifera wines showed (Mansfield and Vickers, 2009; Pedneault et al., 2013a). The level
contradictory results (Baucom et al., 1986; Soleas et al., 1999), sug- of methoxypyrazines has been showed to decrease significantly in
gesting that large differences exist between varieties. Similarly, Frontenac berries during berry ripening (Pedneault et al., 2013a).
studies showed higher level of biogenic amines in organic com- The C9 aldehydes nonanal and trans,cis-2,6-nonadienal have been
pared to conventional wine (reviewed by Provost and Pedneault, shown to reach above-threshold concentrations in red FRG wines
2016). from Eastern Canada, suggesting that they could contribute to the
green notes found in certain FRG wines (Slegers et al., 2015). The
3.3.3. Tannins and color concentration of trans,cis-2,6-nonadienal has also been showed
In contrast with V. vinifera, FRG wines contain high levels of to increase in Frontenac and Marquette berries during ripening
diglycosylated and acetylated anthocyanins and high levels of (Pedneault et al., 2013a).
delphinidin-3-O-glucoside and petunidin-3-O-glucoside that may
provide their wines with purple-blue colors (Table 4) (Manns and
3.4. Improving FRG wine quality
Mansfield, 2012; Manns et al., 2013). This trait varies largely among
FRG varieties.
Historically, assays carried out to improve the quality of FRG
Color instability and lack of mouthfeel are major issues in red
wine were primarily meant to reduce the occurrence of foxy fla-
FRG wines (Manns et al., 2013; Springer and Sacks, 2015). FRG
vors with the use of different winemaking processes. In 1974,
wines generally carry low tannin levels (≤200 mg/L CE eq.) and
carbonic maceration was found to efficiently reduce foxy flavors
high anthocyanin levels (200–1200 mg/L M3G eq.) (Tables 4 and 5).
in red Concord (V. labrusca) wines (Fuleki, 1974; Table 11). Car-
In comparison, red V. vinifera wines contain between 150 and
bonic maceration (CM) was initially developed to reduce oxidation
600 mg/L CE eq. of tannins and between 200 and 400 mg/L of antho-
reactions occurring spontaneously in grapes in order to preserve
cyanin, depending on the variety and winemaking process (Casassa
fruit flavors (Paul, 1996b). In organic wine production, restrict-
and Harbertson, 2014; Kilmister et al., 2014; Pedneault et al., 2014;
ing contact between berries and air using CM may be of particular
Springer and Sacks, 2014). Indeed, studies have demonstrated that
interest because organic grapes have been shown to carry twice as
the majority of traditional extraction processes for FRG winemak-
much polyphenol oxidase activity compared to conventional ones
ing lead to high amounts of anthocyanin rather than tannins, and
(Núnez-Delicado˜ et al., 2006).
yield very dark wines with little mouthfeel (Table 11, Auw et al.,
White FRG wines such as Chardonnel, Solaris and La Crescent
1996; Manns et al., 2013; Pickering and Pour Nikfardjam, 2007;
generally present desirable flowery notes that may be related
Pour Nikfardjam and Pickering, 2008).
to compounds such as C13-norisoprenoids (e.g., -damascenone)
Poor tannin extractability as well as poor retention of exoge-
and monoterpenes (e.g., linalool) located in berry skin (Table 12;
nous tannins in FRG wine was recently related to high protein
Cadwallader et al., 2009; Savits, 2014; Liu et al., 2015). In fact,
concentration that may contribute to precipitate tannins dur-
extended skin maceration (24 h cold-soak and 30 h on-skin fermen-
ing winemaking (Mansfield, 2015b; Springer and Sacks, 2014).
tation) significantly improved the intensity of floral notes in Solaris
Recently, pathogenesis-related proteins have been found to inter-
wines, but also increased green vegetable notes (Zhang et al., 2015).
fere with tannin retention in FRG wines (Springer et al., 2016).
Conversely, short cold-soaks (3–8 h) did not improve the aroma
PR-proteins expressed in reaction to biotic stresses are the major
intensity of Traminette wine (Skinkis et al., 2010).
proteins in V. vinifera wines; they are resistant to proteases and
A recent study reported for the first time the presence of 3-
to low pH values, making them difficult to remove or denature
mercaptohexanol in the FRG variety Cayuga, at a concentration of
(Ferreira et al., 2004).
195 ng/L (Musumeci et al., 2015). This compound is a highly odor
The level of PR-proteins in wine is partly related to the disease
potent thiol (odor perception threshold: 60 ng/L) that produces a
pressure in the vineyard. For instance, organic V. vinifera wines
grapefruit aroma in white wine (Musumeci et al., 2015). Cayuga
were found to contain higher levels of PR-proteins compared to
white is an offspring of Seyval blanc (Seyve-Villard 5–276), a variety
non-organic ones, which was attributed to their higher exposure
that has often been used during the breeding of recent FRG varieties.
to fungi in the field (Sauvage, 2011). The impact of disease pres-
This suggests that 3-mercaptohexanol could be present in other
sure and its possible modulation of PR-protein concentration in FRG
FRG varieties, although its presence has not yet been investigated.
varieties grown under organic management have not been studied
Based on this finding, viticulture (e.g., nitrogen status, disease con-
yet.
trol) and winemaking practices (e.g., oxidation control) that either
The solution currently proposed to resolve the tannin retention
enhance thiol production in berries, protect thiol during winemak-
issue in FRG wine is to treat the juice or the wine with bentonite in
ing, or lead to thiol expression in wine could contribute to increase
order to precipitate the proteins and then add exogenous tannins
the occurrence of tropical aroma in FRG wines (Musumeci et al.,
(Springer et al., 2016).
2015).
Blending is one of the most efficient ways to optimize the aroma
3.3.4. Aroma
of FRG wines. Indeed, most FRG varieties present a very large and
The majority of studies on the aroma of FRG wines focused on
rich flavor range, and many of them have complementary fla-
the well-known “foxy compounds” that provide the “hybrid char-
vor profiles (Slegers et al., 2015). Blending may also significantly
acter” to V. labrusca-based FRG wines. Recent GC-Olfactometry/MS
improve wine balance, especially acidity, reduce bitterness and
analyses demonstrated that most foxy compounds such as o-
improve wine’s overall bouquet. Such richness makes FRG varieties
aminophenone and methyl anthranilate are not very abundant in V.
suitable to a large range of styles that have a high potential to appeal
riparia based FRG wines (Sun et al., 2011a). Similarly, no foxy com-
to consumers.
pounds were reported from GC-O/MS analyses of Frontenac wines
from Minnesota (Mansfield and Vickers, 2009; Table 12).
Many red FRG wines are known for their fruitiness but 4. Conclusion
herbaceous notes are also reported in certain varieties such
as Cabernet cortis, Prior, Regent and Frontenac, among others The well-documented susceptibility of V. vinifera cultivars to
(Table 12; Mansfield and Vickers, 2009; Rousseau et al., 2013). major diseases such as powdery mildew, downy mildew and botry-
Herbaceousness could relate to the presence of methoxypyrazine tis is a significant challenge in organic viticulture. Increasing the
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Table 11
Overview of the impact of several winemaking processes on the chemistry and the sensory perception of wines made from fungus-resistant grape varieties.
Treatments Variety Yeast strain Impacts on wine ref.
Basic chemistry Phenolic and volatile Sensory perception
compounds
Extraction and alcoholic fermentation processes
a
3 vs 8 h cold-soak at Traminette Lalvin K1-V1116 no perceptible impact 1
◦
12 C on wine aroma
intensity
− direct press after Solaris Lalvin DV10TM 24 h cold soak with or extended skin contact 2
crushing without skin (24 h cold soak + 30 h
− whole cluster press fermentation increased skin fermentation)
−
6 h cold soak total polyphenols; increased the intensity
− 24 h cold soak extended skin contact of floral (Rose,
− 6 or 24 h cold (24 h cold soak + 30 h Elderflower) and green
soak + 30 h skin skin fermentation) vegetable descriptors.
fermentation increased the
*chemical concentration of
deacidification used on linalool, hotrienol,
all treatments ␣-terpineol,
-damascenone and
S-methyl thioacetate in
wine.
- cold-soak − enzyme Maréchal Foch GRE hot press increased the 3
addition at crush level of non
- tannins addition at anthonyanin phenolic
crush (including caftaric acid,
- hot press compared to coutaric acid, catechin,
skin fermentation epicatechin, catechin,
(7 days) rutin), and the level of
monoglucoside and diglucoside
anthocyanins;
tannin addition and
hot press increased
tannin concentration
but had no impact on
their mean degree of
polymerization.
Corot noir GRE tannin addition 3
increased tannin
concentration whereas
hot press decreased it,
both did not impact the
mean degree of
polymerization.
- hot press Marquette GRE hot press increased 3
- skin fermentation anthocyanin
(7 days) monoglucosides and
tannin concentrations.
- immediate press for Chambourcin Prise de mousse hot press (juice and 4
juice wine) increased color
- immediate press for intensity (A520 nm);
wine 13d and 21d skin
- hot press for juice fermentation decrease
- hot press for wine color intensity
- skin fermentation compared to 7d
(7, 13, and 21 days) treatment;
immediat press (juice
& wine) increased
browning (Hue);
extended on-skin
fermentation
decreased the level of
caftaric acid, coutaric
acid, and procyanidin
B3, and increased the
level of gallic acid;
hot press increased
total phenol
concentration.
-carbonic maceration Concord no starter in CM; carbonic maceration carbonic maceration 5
◦
(CM) at 15 or 27 C, for 1 unknown starter used reduced the occurrence decreased the intensity
or 2 weeks in other trials of bluish tones, the of V. labrusca typical
- skin fermentation concentration in total flavor.
- hot press phenols and decreased
the concentration in
methyl anthranilate.
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Table 11 (Continued)
Treatments Variety Yeast strain Impacts on wine ref.
Basic chemistry Phenolic and volatile Sensory perception
compounds
two experiments: Maréchal Foch Epernay II the use of 100% whole 100% whole berries 6
1) Standard berries or whole and whole clusters
fermentation with clusters decreased the decreased total
varying percentage of level of residual sugars; phenols and color;
whole berries; 8d CM decreased TA extended CM (8d)
2) CM with whole and alcohol percentage, increased total
clusters (2, 4, 8 days) and increased pH phenols.
® ® ®
addition of OptiRed Baco noir EC1118 OptiRed increased the OptiRed had no 7,8
(inactivated yeast concentration of perceptible impact on
derivative) at the dimers procyanidins; wine mouthfeel.
®
beginning of skin OptiRed increased the
fermentation (19 days) concentration of
tyrosol and quercetin,
and decreased the
concentration of caffeic
acid, grape reaction
product, and delphinidin.
® ®
Maréchal Foch EC1118 OptiRed increased the OptiRed had no
concentration of dimer perceptible impact on
and trimers wine mouthfeel. procyanidins; ®
OptiRed increased the
concentration of caffeic
acid and decreased the
concentration of
caftaric acid,
p-coumaric acid, and
quercetin.
malolactic fermentation Chancellor, DeChaunac, Montrachet Non-inoculated control wines fermented with 9
(MLF): Maréchal Foch did not completed PSU-1 and LS-5A were
non inoculated control MLF; preferred over ML-34
compared to inoculation PSU-1 and LS-5A wines;
with the Leuconostoc strains completed MLF all inoculated wines
oenos strains ML-34, faster than ML-34; were preferred to the
PSU-1, and LS-5A MLF increased wine pH non inoculated control.
in Chancellor (strain
LS-5A only) and
Maréchal Foch,
decreased TA, and
increased volatile
acidity in all wines.
Post-fermentation processes and aging
French (Nevers; Seyval n.d. american oak increased perceptible changes in 10
Limousin) and American gallic acid content of sensory attributes of
oak barrels aging wine at a slightly wines compared to
compared to unoaked higher rate than French unoaked control were
control oak; perceptible after 7
the concentration of weeks of aging;
other non-flavonoid by the 12th week,
compounds wines were
(photocatechuic, distinguishable
vanillic, caffeic, according to the oak
syringic and type used for aging.
p-coumaric acids) were
no affected.
a
(1) Skinkis et al., 2010; (2) Zhang et al., 2015; (3) Manns et al., 2013; (4) Auw et al., 1996; (5) Fuleki, 1974; (6) Miller and Howell, 1989; (7) Pour Nikfardjam and Pickering,
2008; (8) Pickering and Pour Nikfardjam, 2007; (9) Giannakopoulos et al., 1984; (10) Jindra and Gallander, 1987.
use of FRG varieties would allow significant benefits for organic winemaking practices can contribute to improved FRG wine qual-
and conventional growers, including reducing the number of treat- ity. Further research on these topics are needed to provide a
ments per season, increasing grape yield and reducing labor costs. more comprehensive understanding of the optimal cultural and
In addition, FRG would allow significant reduction in the use of winemaking practices for FRG varieties, with an emphasis on the
copper-based fungicide, therefore contributing to decrease cop- potential side-effects from disease resistance that could interfere
per accumulation in vineyard soils, especially in areas under high with the development of high quality wines (e.g., PR-proteins).
disease pressure. The commercialization of organic FRG wines faces a double
Consumer surveys have showed that wines made from FRG challenge of growing grape varieties that are generally unknown
varieties are at least equivalent and frequently rated as supe- to consumers and doing it under organic management. Both FRG
rior to V. vinifera wines in terms of quality. Trials conducted over and organic wines previously suffered from the production of bad
the last 30 years have showed that canopy management and wines that contributed to negative opinions among consumers
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Table 12
Overview of volatile compounds, impact odorants and sensory descriptors in wines from 20 fungus-resistant grape varieties.
*
Variety Method Analytical Sensory Ref.
1
Volatile compounds Concentration (g/L) Aroma and flavors descriptors
reds
a
Cabernet Cortis sensory analysis using foxy, herbaceous, bell 1
similar descriptors for pepper, jammy, spicy
all varieties evaluated
Chancellor descriptive analysis berry, currant, earthy, 2 vegetal
**
Frontenac descriptive analysis & ethyl isobutyrate 0.1–0.5 mg/L cherry, black currant, 3
G C-O/MS vegetal, earthy
ethyl lactate 0.2–1.5 mg/L
ethyl 2-methylbutanoate 30−200
ethyl 3-methylbutanoate 40−720
1-hexanol 0-0.8 mg/L
ethyl hexanoate 1.2–3.6
phenethyl alcohol 0.8–2.1 mg/L
diethyl succinate 1.4–4.4
octanoic acid 0.8–5.4
ethyl decanoate 1.1–3.7
Frontenac GC–MS & odor activity nonanal 40 4 values
trans,cis-2,6-nonadienal 1.26
-damascenone 3.99
ethyl 2-methylpropanoate 281
ethyl hexanoate 450
ethyl octanoate 1128
Maréchal Foch GC–MS & odor activity nonanal 34.8 4 values
trans,cis-2,6-nonadienal 1.44
-damascenone 2.25
ethyl 2-methylpropanoate 281
ethyl hexanoate 227
ethyl octanoate 781
Marquette GC–MS & odor activity nonanal 52.2 4 values
trans,cis-2,6-nonadienal 1.15
-damascenone 2.47
linalool 36.2
ethyl 2-methylpropanoate 254
ethyl butanoate 327
ethyl hexanoate 803
ethyl octanoate 2383
Othello GC–MS & odor activity methyl anthranilate 5 values trans-2-hexenal hexanol
ethyl 3-methylbutanoate nonanal 2-phenylethanol
ethyl decanoate
Prior Sensory analysis using foxy, fusel alcohol, 1
similar descriptors for herbaceous, fresh fruit,
all varieties evaluated jammy
Regent Sensory analysis using foxy, animal, herbaceous, 1
similar descriptors for spicy
all varieties evaluated
Sabrevois GC–MS & odor activity nonanal 33.4 4 values
trans,cis-2,6-nonadienal 1.13
eugenol 23.1
ethyl 2-methylpropanoate 283
ethyl octanoate 643
St. Croix GC–MS & odor activity nonanal 30 4 values
trans,cis-2,6-nonadienal 1.19
eugenol 3.38
ethyl 2-methylpropanoate 265
ethyl octanoate 768
whites
Cayuga white GC-O/MS (Charm) 2-phenylethanol 6
-damascenone
C3 and C4 fatty acids
ethyl butyrate
linalool
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Table 12 (Continued)
*
Variety Method Analytical Sensory Ref.
1
Volatile compounds Concentration (g/L) Aroma and flavors
descriptors
GC–MS 3-mercaptohexanol 195 ng/L 7
Cabernet blanc Sensory analysis using herbaceous, citrus fruit, 1
similar descriptors for tropical fruit
all varieties evaluated
Chardonnel descriptive analysis, ethyl butanoate 147−422 fruit, floral, spicy 8
GC-O. GC–MS, and
OAVs
ethyl 3-methylbutanoate ND-25.1
ethyl hexanoate 721−999
3-methyl-1-butanol 37.5–170 ppm
2-phenylethanol 8.94–23.4 ppm 
-damascenone 1.4–3.2
sotolon detected in GC-O; not
quantified
Johanniter sensory analysis using sulfur, white fruit in syrup, 1
similar descriptors for dry fruit, apricot
all varieties evaluated
La Crescent descriptive analysis apricot, grapefruit, lychee, 9
pineapple, rose
Muscaris sensory analysis using sulfur, fusel alcohol, citrus 1
similar descriptors for fruit, tropical fruit, white
all varieties evaluated fruit in syrup
Seyval descriptive analysis floral, apple, earthy, melon, 2
vegetal
descriptive analysis fruity, vegetal, 10
caramelized, pungent
GC-O/MS (Charm) -damascenone 6 2-phenylethanol
methyl anthranilate
ethyl 2-methylbutanoate
vanillin
Solaris descriptive analysis, ethyl butyrate peach/apricot, Muscat, 11
GC–MS melon, banana, strawberry
propyl acetate
butyl acetate
3-methylbutyl acetate
hexyl acetate trans-3-hexenyl-acetate
2-phenylethyl acetate
descriptive analysis fruity, citrus, tropical fruit, 12
flowery, elderflower
***
Vidal GC-O/MS & OAVs ethyl 2-methylbyturate 14.2 13
-damascenone 11.3
decanal 13.7
geranyl acetone 0.26
ethyl hexanoate 878
1-octanol 9.34
nerol oxide 6.98
4-vinylguaiacol 111
descriptive analysis young wines: apple, 14
tropical fruit, citrus
aged wines: cooked
vegetables, straw, oxidized,
pungent
GC-O/MS (Charm) -damascenone 6 2-phenylethanol linalool
*
3 to 9 wines per varieties.
**
Compounds with frequency of detection higher than 75%. ***
Nose-perceptible odorants.
a
(1) Rousseau et al., 2013; (2) Reynolds et al., 2004; (3) Mansfield and Vickers, 2009; (4) Slegers et al., 2015; (5) Radulovic´ et al., 2010; (6) Chisholm et al., 1994; (7)
Musumeci et al., 2015 (8) Cadwallader et al., 2009; (9) Savits, 2014; (10) Andrews et al., 1990; (11) Liu et al., 2015; (12) Linden, 2014; (13) Bowen and Reynolds, 2012; (14)
Chisholm et al., 1995.
concerning these products. Therefore, significant efforts are neces- regarding the future of these varieties, in both organic and conven-
sary to demonstrate and improve the quality of organic FRG wines, tional viticulture.
and have them accepted by consumers. According to the Web of Sci-
ence database, the number of scientific publications involving FRG
Acknowledgements
varieties increased by 86% between 2011 and 2016, when compared
to the 2005–2010 period (search restricted to “fungus resistant
The authors wish to thank Gaëlle Dubé, viticulture specialist,
grape or varieties” and “interspecific hybrid grape or varieties”).
for valuable information on organic grape production from FRG
Such rise in the interest for FRG opens the door to great expectations
varieties, and Dr. Ross Stevenson (UQAM), for kindly reviewing the
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